1.

A mass M is suspended from a light spring. An additional mass m added displaces the spring further by a distance x. Now the combined mass will oscillate on the spring with a period :

Answer»

`T=2pi sqrt((mg)/(x(M+m)))`
`T=2pi sqrt(((M+m)x)/(mg))`
`T=(PI)/(2)sqrt((mg)/(X(M+m)))`
`T=2pi sqrt(((M+m))/(mg))`.

Solution :Here `mg=kximpliesk=mg//x`.
`T=2pi sqrt(((M+m))/(K))impliesT=2pi sqrt(((M+m)x)/(mg))`.
So correct choice is (B).


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